Officers seized four firearms, drugs and a large quantity of money and alcohol, which police believe was being sold without the appropriate licence.

The little-known Scoundrels are believed to be affiliated with the Vikings, who also have a clubhouse in Ballarat and have been linked to the Hells Angels.

One person was taken into custody and is assisting police with their enquiries.

The Scoundrels clubhouse is less than three kilometres from the clubhouse of the Vikings, which is in Lalor Street.

It was revealed in a firearms appeals committee hearing last month that Vikings members were present the night Mr Mitchell was shot in Melton.

Police believe the Vikings are one of several smaller clubs linked to the Hells Angels that were called to the Satan's Soldiers Melton clubhouse for a meeting, before several hundred bikies did a "run through" of the nearby Diablos clubhouse. The Diablos are linked to the Bandidos, and Mr Mitchell was shot after travelling from Brunswick when he heard of the run-through.

Detective Inspector Ian Campbell from Taskforce Echo said police had made strong in-roads in their recent efforts against outlaw motorcycle gangs.

In the past 10 days, police have seized six firearms from affiliated gangs.

“There is no place in our community for those that think they can seek their own justice and take the law into their own hands,” Inspector Campbell said.

“As part of Operation Resound, we remain committed to targeting conflict between OMCGs and disrupting illegal activity.”

Thursday's police action follows the execution of a search warrant and seizure of goods from the Bros Motorcycle Club's Yarraville clubhouse on Wednesday.

Following the raid, police arrested and charged a 23-year-old Footscray man with 17 offences including possession of a firearm, possessing suspected stolen goods, assaulting police and resisting arrest.

He has been bailed to appear before the Melbourne Magistrates' Court on October 21.

In an incident unrelated to the recent police raids, a senior office bearer, believed to be affiliated with the Hells Angels Seaford chapter, has been arrested and is being interviewed by Frankston police.